| Autor: |
Wu S; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, College of Metallurgy and Energy Engineering, Kunming University of Science and Technology, 121 Street, Wenchang Road 68, Kunming 650093, China., Shen F; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, College of Metallurgy and Energy Engineering, Kunming University of Science and Technology, 121 Street, Wenchang Road 68, Kunming 650093, China., Zhao P; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, College of Metallurgy and Energy Engineering, Kunming University of Science and Technology, 121 Street, Wenchang Road 68, Kunming 650093, China., Mou J; Engineering Training Center, Kunming University of Science and Technology, Kunming 650093, China., Miao S; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, College of Metallurgy and Energy Engineering, Kunming University of Science and Technology, 121 Street, Wenchang Road 68, Kunming 650093, China., Liu J; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, College of Metallurgy and Energy Engineering, Kunming University of Science and Technology, 121 Street, Wenchang Road 68, Kunming 650093, China., Shi J; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, College of Metallurgy and Energy Engineering, Kunming University of Science and Technology, 121 Street, Wenchang Road 68, Kunming 650093, China., Chen T; Engineering Training Center, Kunming University of Science and Technology, Kunming 650093, China. |
| Abstrakt: |
Electroreduction of carbon dioxide (CO 2 RR) using renewable energy offers a sustainable approach for generating valuable chemicals. In this study, a three-chamber electrolyzer was utilized for the direct coproduction of CO, Cl 2 , and NaOH from CO 2 and NaCl electrolysis, contributing to net CO 2 consumption and supporting industries like phosgene synthesis. To improve the electrolyzer performance, a Ga-based metal composite catalyst (Ga @ In 4 Ag 9 /Cu) was developed. This catalyst efficiently reduced CO 2 to CO during long-term electrolysis, achieving a CO partial current density of 147.16 mA·cm -2 and a faradaic efficiency of 93.1% at -2.4 V (vs SHE). Density functional theory (DFT) calculations revealed that Ag atoms modulate the d-band center of Ga @ In 4 Ag 9 /Cu, enhancing its interaction with the reaction intermediates. This work introduces a Ga-based porous catalyst for CO 2 electrolysis in organic electrolytes, offering a promising system for the coproduction of CO, Cl 2 , and NaOH through a coupled reaction. |
